673615687 has 2 divisors, whose sum is σ = 673615688. Its totient is φ = 673615686.

The previous prime is 673615669. The next prime is 673615781. The reversal of 673615687 is 786516376.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 673615687 - 2¹¹ = 673613639 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 673615687.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (673615087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336807843 + 336807844.

It is an arithmetic number, because the mean of its divisors is an integer number (336807844).

Almost surely, 2^673615687 is an apocalyptic number.

673615687 is a deficient number, since it is larger than the sum of its proper divisors (1).

673615687 is an equidigital number, since it uses as much as digits as its factorization.

673615687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 49.

The square root of 673615687 is about 25954.1073242753. The cubic root of 673615687 is about 876.6052435356.

The spelling of 673615687 in words is "six hundred seventy-three million, six hundred fifteen thousand, six hundred eighty-seven".